Rewinding device



J. A. CAMERON AND G. B. BIRCH.

REWINDING DEVICE.

APPLICATION FILED 020.9, I916.

Pabtentfl Dec. 5, 1922 3 SHEETS-SHEET I.

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REWINDING @EWCE.

APPLICATION FILED M09. l9l6.

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REWINDING DEVICE.

APPLICATION men 050.9. 1915.

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I UNITED STATES 1,437,398 PATENT OFFICE.

JAME A. CAMERON AND GUSTAE BIRGER BIRCH, OF BROOKl'JYN, NEW YORK,ASSIGNORS TO CAMERON MACHINE COMPANY, OF BROOKLYN, NEW YORK,

A CORPORATION OF NEW YORK.

REWINDING DEVICE.

Application filed December 9, 1916. Serial No. 135,946.

To all whom it may concern:

. Be it known that we, JAMES A. CAMERON and GUs'rAr B. BIRCH, citizensof the United States, and residents of the {borough of in the county ofKings, city and State of New York, have invented certain new and usefulImprovements in Rewinding Devices, of which the following is aspecification.

This invention relates to rewind shafts for use in connection withslitting and rewindin machines, and. is particularly adapte for use inconnection with machines of the center rewind type.

In the art of slitting and rewinding sheet material it is frequentlyfound that, because of imperfections in the methods of manufacture, thematerial to be operated upon is not uniformly thick throughout its area.This results in a tendency on the part of the rewound coils supplied bythe thicker material to increase in diameter faster than the coilssupplied by the thinner portion of the web with a consequent unevendistribution of tension on the different strips caused by the difierentperipheral speeds of coils of different size. This uneven distributionof tension on the different strips causes un equal pulls at the point ofseverance Which in turn distorts the strips out of the plane ofseverance thereby preventing even slitting when score cutters act ngagainst a hardened cutter roll are used. In consequence the slitting isuneven and when the slitted sections are rewound into adjacent coils onthe same shaft, interweaving will take place. In the cases where themachines employed are of the surface rewind type, such as that shown inPatent No. 1,076,189 in which a plurality of driven rollers engageopposite portions of the peripheries of the rewound 0011s underpressure, this tendency on the part of the 00119 to assume differentdiameters is overcome by the pressure of the rollers. However, in thesmaller center rewind type of machine in which the rewound coils areperipherally engaged only by the rewlnding roll, or rolls, which engageonly one slde of the coils, and the rewound coils are consequently notbuilt up with as great a degree of uniformity as 1s the case in thesurface rewind machines, difficulty has been experienced when handlingcertain materials in causing the coils to rotate at the same peripheralspeed to thereby exert a uniform tenslon on all the strips at theslitting point.

In the center rewind type of slitting and rewinding machine the rewindshaft is driven independently of the peripheral engagement of therewound coils with the rewinding roll and through a mechanicalconnection with a driven part of the machine. The result is that all therewound coils are driven from the same shaft at the same angular speed,so that, when the material is of greater thickness adjacent the edgesthan in the center, the greater circumferences of the end coils on theshaft must necessarily travel at a greater surface speed than the coilsnear the center of the shaft and consequently exert a greater tension onthe correspondlng outer strips. On the other hand, the tension exertedon the inner or central strips, because of the lower surface speed ofthe smaller inner coils supplied by the thinner central portion of theweb, is so much less than the tension on the outer strips, that thecentral coils are relatively loosely wound. This condition has theeifect of interfering with building up the central rolls to thedimensions required,

.because of the tendency of separated rolls to collapse, and of theedges of contiguous rolls to interweave with each other.

The imperfections in the material do not always, however, manifestthemselves in the same way, that is, the thin portion of the material isnot invariably coincident with the central section of the web but isfrequently located adjacent one or both edges of the web or between theedges and the center. In any case the general result is the same, andthe rewound coils supplied by the thinner portions of the web and havingconsequent smaller diameters than the remaining coils, are loosely andimperfectly wound.

The main object of this invention is to provide means in a slitting andrewinding machine of the center rewind type for equalizing the pull onthe different strips regardless of variations in diameter among thecoils.

The invention consists principally in a slitting and rewinding machineof the center rewind typein which the rewind shaft permits the severalcoils to rotate at different angular speeds but at substantially anotherform of machine embodying the invention.

Figure 4 is a vertical sectional, view at right angles to the view shownin Figure v3, with parts broken away, taken substantially along the line44 of Figure 3.

Figure 5 is a view partly in plan and partly in horizontal sectionshowing the sectional rewind shaft.

Figure 6 is an enlarged detail view, showing the means for driving oneof the sleeves on the rewind shaft.

Figure 7 is an enlarged sectional detail view looking along the line 77of Figure 2.

Figure 8 is a detail View looking in from the right of Fig. 4 andshowing the slip drive connection and adjacent parts.

In the particular embodiments of the invention chosen for illustrationthere are shown slitting and rewinding machines which are generally ofthe center rewind type, in which the rewind shaft is mechanicallyconnected through a slip drive connection with a moving part of themachine.

In one machine including an embodiment of the invention there is shownatypical form-of center rewind machine in which a single, combinedbacking and cutter roll engages the periphery of the rewound coils anddirectly delivers the severed strips of material to the coils. Thecutter roll is provided with a hardened surface against which scorecutters roll to slit the web as in the construction shown in Patent No.1,076,189, already referred to. In the other form of the invention amachine is shown which.- includes the 'independently driven rewind shaftof the typical center rewind machine and also partakes of the nature ofthe surface rewind type of machine in that two rewinding rolls areemployed on which the rewound coils are supported. In both embodimentsof the invention the rewound coils are held pressed into engagement withthe rewinding roll, or rolls, by pressure exerted through the rewindshaft. Because of the inadequacy of the pressure thus exerted toequalize the diameters of all the rewound coils a rewind shaft havingsections adapted to rotate at different angular speeds has been providedby means of which the coils can be operated at the same peripheral speedto thereby equalize the pull on the different strips regardless ofvariations in the diameter of the coils.

In Figures 1 and 2 of the drawing a center rewind shaft 1 havin thecharacteristics just mentioned is embodied in a slittin and rewindingmachine in which a sing 0 rewinding roll 2 serves both as av cutterroll.- and to deliver the web 3 directly to the peripheries of therewound coils 4. The cutter roll 2 peripherally engages and rotates thescore cutters 5 in the manner described ill the patent referred to sothat the web 3 is severed into strips as it is drawn into the machinefrom the mill roll 6.

The cutter roll 2 serves also. as a drivin means for the rewind shaft 1through a gear connection which includes a gear 7 mounted on the end ofthe cutter roll shaft. The cutter roll itself may be driven in anysuitable manner through the application of power to the opposite endthereof. The gear 7 preferably meshes with a gear 8 loosely mounted onthe shaft 9 and connected through a friction clutch 10 with another gear11 loose on the same shaft 9 which is preferably journaled in brackets48 supported on a stay bar 49. The gdar 11 meshes in turn with anintermediate gear 12 which directly drives the pinion 13 on the driveshaft 43 to which the rewind shaft 1 is adapted to be coupled. Throughthe friction clutch 10 a slip drive or yielding connection is providedand by means of the hand Wheels 44 and the spring 45 the effectivenessof the friction clutch can be varied to thereby decrease the speed ofangular rotation of the rewound coils 4 to maintain the .peripheralspeed substantially constant as the diameters of the coils increase.

It will be seen that it is necessary to provide for the gradual movementof the rewind shaft 1 farther away from the cutter roll 2 as thediameter of the rewound coils increase with the addition of morematerial thereto. In the form of the invention shown in Figures 1 and 2of the drawing provision has been made for this by mounting theintermediate gear 12, the pinion 13 with the drive shaft 43 and thecorresponding end of the rewind shaft 1 on an arm 34 which is rigidlymounted on the shaft 9 about which the gears 8 and 11 rotate. It will beseen that by this arrangement the arm' 34 and the parts carried thereby,together with a corresponding arm 42 which sup-ports the other end ofthe rewind shaft 1 at the other side of the machine, will be pushedoutwardly away from the shaft cutter roll 2 by the in creasing diameterof the rewound coils. Since the arm 34 carrying the intermediate gear 12swings about the same axis about which the gear 11 rotates the geartransmission is not affected by a change in the position of the arm aswill be obvious. The outward movement of the arms 34 and 42 is constant]resisted by the weight 46 which is carried by an arm 47 fixed to theshaft 9 and which through the arms 34 and 42 causes the rewind shaft 1and the coils carried thereby to exert a constant pressure against thecutter roll 2.

While the speed of rotation of the rewind shaft and of the rewound coilsas a whole can be controlled toniiaintain the peripheral speed of therewound icoi-lssubstantially constant through the slip driveconstruction which has been described, this construction does not rovidefor rotating individual coils of di erent diameters on the same rewindshaft at different angular speeds in order to secure a uniformperipheral speed of the several coils and thereby compensate forvariations in the diameter of the different coils.

In order to provide for the rotation of different coils on the rewindshaft at different s eeds, a rewind shaft of the type shown in F igure 5of the drawing, has been provided. This rewind shaft is preferablyconstructed in sections which are adapted to support the rewound coilsand to be driven at different speeds. In this particular embodiment ofthe invention the rewind shaft is made up of a central section 14adapted to be positively driven from the drive shaft 43 through acoupling connection shownat 15. The rewind shaft is provided withreduced end portions 16 upon which the sleeves 17 are mounted. Thesleeves 17, which may themselves be divided into sections as at 17,ordinarily rotate with and at the same speed as the central section 14of the rewind shaft. In order to provide for different relative speedsof the sleeves 17 and the central section 14 of the rewind shaft, a slipconnection is provided between the sleeves and the central portion ofthe shaft.

This slip or yielding connection is afforded by means of the pressuresprings 18 which press the sleeves into engagement with the shoulders 19formed by the ends of the central section 14 of the shaft. The pressureexerted by the springs 18 can be varied by means of the adjusting nuts19 and the locking nuts 20 which operate on a further reduced andthreaded portion 21 at each end of the rewind shaft. Fibre washers 22,which are intended to serve as wear pieces, are introduced between theends of the sleeves 17 and the shoulders 19 of the central portion ofthe shaft, as well as at the opposite ends of the sleeves. Washers 23are preferably placed between the springs 18 and the washer 22 at theadjacent ends of the sleeves. These washers are preferably provided withprojections 24 which extend into key-ways 25 cut in the reduced portions21 of the shaft so that the washers 23 are constrained to rotate withthe reduced portion 22 and consequently at the same speed of rotation asthat of the central portion 14 of the shaft. By this construction itwill be seen-that driving members are provided at each end of the sleevemembers 17 and the relative speed of rotation of the sleeves and thedriving members 19 and 23 is determined by the degree of frictionmaintained between these members and the sleeves by the pressure of thesprings 18. Washers 26 are also provided at the outer ends of thesprings 18 and these washers are inturn separated from the adacentadusting nuts 19 by means of a second set of fibre washers 27.

It is necessary in the operation of machines of this nature to make therewind shafts replaceable. The coupling connection 15 is accordinglymounted so as to slide longitudinally on the drive shaft 43 by means ofa spline 28. A spring 29 acts to move the coupling member 15 intoposition to engage the locking lugs 30 projecting from the correspondingend of the rewind shaft. In order to slide the coupling member 15 alongthe shaft 43 against the pressure of the spring 29 to thereby disengagethe end of the rewind shaft a bell crank 31 having a forked end adaptedto engage a groove 32 in the coupling member is pivoted at 33 on the arm34 and is adapted to be rocked by means of the hand lever 35 on the arm34. The hand lever 35 is so placed that, when it is grasped by anoperator and moved toward the adacent upper end of the arm 34, it willengage and swing the bell crank 31 about its pivot to thereby disengagethe coupling member 15 from the end of therewind shaft.

The other end of the rewind shaft is preferably provided with a bearingportion 33 adapted to fit into the notch 34 provided in the uppersurface of the extremity of the arm 42 at the other side of the machine.In order to lock this end of the rewind shaft in its seat in the groove34' a latching member 36 provided with a shaft-engaging notch 41 in itsend is slidably mounted on the side of the arm 42 by means of the slots37 and the studs 38. One of the studs 38 is provided with a wing nut 39by means of which the latching member 36 can be fastened in its lockingposition. A handle 40 is provided for moving the locking member into andout of its locking position.

In the form of the invention shown in Figures 3 and 4 the rewound coils4 are supported on a pair of rewinding I'Olls and 50, as in the surfacerewind machine of,

which the patent already referred to is an example. The roll 2 ispreferably utilized as a cutter roll as in the form of the machine shownin Figures 1 and 2, and the slitting discs cooperate with the cutterroll 2 to slit the web 3 as it passes through the machine from the webroll 6.

In this form of the invention the rewind substantially uniform diameter,as is the case with the machine shown in Patent No. 1,076,189.

It has been found in practice, however, that in handling certainmaterials it is not desirable to exert any great amount of pressure onthe rewound coils while they are being built up and it is with suchmaterials that the sectional rewind shaft already described can beusefully combined with this type of center rewind machine. Means haveaccordingly been provided for varying the degree of downward pressurewhich is exerted by the framework 51 on the rewind shaft 1 and thismeans takes the form of a sectional counterweight 53' which is connectedto the lower end of a rack 52 through a flexible connector 54' passingover a pulley 55 mounted on a fixed bracket 56 integral with theframework of the machine. Sections of the counterweight can be added orremoved tovary the pressure exerted through the framework 51 on therewind shaft 1, as will be obvious.

In this form of the invention as well, as in the form shown in Figures 1and 2, a slip drive connection is provided for the rewind shaft 1. Thisdriving connection comprises a spiral gear 57 mounted on the end of theshaft of the cutter roll 2 which meshes with another spiral gear 58journaled in a bracket 59 supported on the framework of the machine. Thespiral gear 58 is adapted to rotate a vertical drive. shaft 60 journaledand supported at its upper end in a bracket 61 carried by the framework51 and provided with a spline 62 permitting it to slide verticallythrough the spiral gear 58 as the framework 51 carrying the rewind shaft1 moves upwardly with the increasing diameter of the rewound coils. Afriction clutch device forming the slip drive connection comprises adriving member 63 fast to the drive shaft 60 and a driven member 64rigidly connected to the bevel gear 65 which is free to rotate on theshaft 60. The bevel gear 65 meshes in turn with a bevel gear 66 carriedby a shaft 67 adapted to be coupled to the rewind shaft 1 through asuitable coupling connection indicated at 68. By means of the hand wheel69 and spring 70 the effectiveness of the friction clutch provided bythe members 63 and 64 can be varied to thereby vary the speed of angularrotation of the rewound coils 4 to maintain the peripheral speedsubstantially constant as the diameters of the coils increase.

By means of the hand wheel 71 the pinions 53 can be rotated through thechain 7 2 and sprockets 7 3 and 74 to thereby lift the rewind shaftclear of the rewinding rolls in order to make the rolls more accessiblefor threading or the like.

It will be seen that, by means of the construction described, provisionhas been made in slitting and rewlnding machines of the center rewindtype for permitting the angular speed of rotation of rewound coils ofdifferent size to be varied to the extent necessary to maintain theperipheral speed of the several coils constant, thereby exerting thesame pull on all the strips at the slitting point, regardless ofvariations in diameter amon the rewound coils. The uniformity of thlspull on the different strips will ordinarily be amply secured by thedivision of the rewind shaft into a central section and two end sleevesections, but it will be obvious that a still greater degree ofuniformity can be secured, particularly when there is a substantialdifference between the size of coils on the same sleeve, by dividing thesleeves themselves into sections.

While the invention has been shown and described as particularly adaptedfor use in slitting and rewinding-machines of the gen.- eral centerrewind type, it is obvious that in handling materials in which it isdesirable to exert little or no pressure upon the upper surface of therewound coils in the surface rewind type of machine shown in the patentreferred to, the sectional rewind shaft shown and described could beadvantageously used. It is to be noted, however, that neither in thesurface rewind type of machine, nor in the machine shown in Figures 3and 4:, and which is, in a sense, a combination of both the centerrewind and the surface rewind types, can the sectional rewind shaft beused with the same advantage as in the typical center rewind machineshown in Figures 1 and 2.

What is claimed, is:

1. A slitting and rewinding machine comprising: slitting means includingscore cutting means for dividing a web without distortion at the planeof severance, rewinding means including a rewinding shaft on whichadjacent coils are rewound side by side acting to pull the web throughthe slitting means, and means for varying the speed of rotation ofindividual coils to exert an equal pull at all points laterally at theplane of severance notwithstanding differences in diameter of therewound coils.

2. slitting and rewinding machine comprising: slitting means includingscore cutting means for dividing a web without distortion at the planeof severance, rewinding means including a rewinding shaft on whichadjacent coils are rewound side by side acting to pull the web throughthe slitting means, and slip friction means for varying the speed ofrotation of individual coils to exert an equal pull at all pointslaterally at the plane of severance notwithstanding differences indiameter of the rewound coils.

3. A slitting and rewinding machine comprising: slitting means includingscore cutting means for dividing a Web without distortion at the planeof severance, rewinding means including a rewinding shaft on whichdjacent coils are rewound side by side acting to pull the web throughthe slitting means, slip friction means for driving the re- Windingshaft, and slip friction means for varying the speed of rotation ofindividual coils to exert an equal pull at all points laterally at theplane of severance notwithstanding difl'erencesin diameter of therewound coils.

Signed at Brooklyn, New York, in the county of Kings and State of NewYork, this 1st day of December, A. D. 1916.

JAMES A. CAMERON. GUSTAF BIRGER BIRCH.

